On Wednesday, firefighters responded to a vehicle fire in the 1000 block of Juniper Drive at 3:17 a.m. Just over an hour later, another vehicle fire was reported in the 100 block of Gibson Drive.

The fire department was then called to a fire at 7 a.m., at a medical building in the 900 block of Sunnyslope Road. Officials said there was another fire at the same medical complex on Nov. 14.

Investigators said evidence indicated that the Wednesday fires had been deliberately set. Fire Hollister Fire Marshal Capt. Mike O'Connor determined the blaze started in a similar matter in the three cases.

The Hollister Police Department said the incidents occurred within walking distance of each other and there is no apparent connection between the vehicle owners and the medical building. Investigators said the fires appear to have been randomly set.

Police ask anyone with information about the arson cases to call David Anderson at 831-636-4330. Those who wish to remain anonymous can call the WeTip hotline at 800-78-CRIME.